US6086466A - Centrifugal expansion roller for sanding machines - Google Patents

Centrifugal expansion roller for sanding machines Download PDF

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Publication number
US6086466A
US6086466A US09/165,377 US16537798A US6086466A US 6086466 A US6086466 A US 6086466A US 16537798 A US16537798 A US 16537798A US 6086466 A US6086466 A US 6086466A
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US
United States
Prior art keywords
end part
roller
slits
cylindrical surface
outer cylindrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/165,377
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English (en)
Inventor
Claudio Tasin
Alberto Felici
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunzle and Tasin Srl
Original Assignee
Unibase SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to IT97MI002239A priority Critical patent/IT1298703B1/it
Priority to DE69803964T priority patent/DE69803964T2/de
Priority to PT98117841T priority patent/PT906809E/pt
Priority to AT98117841T priority patent/ATE213684T1/de
Priority to EP98117841A priority patent/EP0906809B1/de
Priority to ES98117841T priority patent/ES2172847T3/es
Priority to CA002246122A priority patent/CA2246122C/en
Application filed by Unibase SpA filed Critical Unibase SpA
Priority to US09/165,377 priority patent/US6086466A/en
Assigned to UNIBASE. S.P.A. reassignment UNIBASE. S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FELICI, ALBERTO, TASIN, CLAUDIO
Application granted granted Critical
Publication of US6086466A publication Critical patent/US6086466A/en
Assigned to KUNZLE & TASIN S.P.A. reassignment KUNZLE & TASIN S.P.A. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: UNIBASE S.P.A.
Assigned to KUNZLE & TASIN S.R.L. reassignment KUNZLE & TASIN S.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUNZLE & TASIN S.P.A (IN BANKRUPTCY)
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/02—Expansible drums for carrying flexible material in tubular form, e.g. expanded by centrifugal force

Definitions

  • the present invention concerns an improved centrifugal expansion roller for sanding machines, particularly floor sanders.
  • centrifugal expansion rollers consist of a metal core (generally of aluminium) and of an outer elastomeric annular cover (usually of rubber) fixed to the core.
  • a plurality of longitudinal slits are formed on the outer surface of said annular cover, such slits extending along non-radial planes and having a depth such as to leave an uncut elastomer portion towards the core.
  • the centrifugal rollers In respect of the conventional sand rollers with sand (abrasive) strips fixed by suitable means, the centrifugal rollers have the advantage of being very easy to produce, while the sand belt is easy to mount.
  • rollers also involve some significant drawbacks.
  • each slit on the roller surface presses the abrasive onto the floor simultaneously along the whole generating line of said roller, which consequently moves forward slit by slit, leading to an unsatisfactory quality of the sanded surfaces and causing a loud noise.
  • centrifugal rollers have been produced with slits extending in a helicoidal sense. But this system--when the roller is pressed onto the floor with the force required to do the sanding--produces an axial component, which tends to drive the sand belt out of the roller hence making this solution unacceptable.
  • the present invention now faces and solves the problem by providing an improved centrifugal expansion roller for sanding machines, particularly floor sanders--of the type consisting of a metal core with an outer elastomeric annular cover provided, over its entire surface, with a plurality of longitudinal slits extending into the annular cover along non-radial planes, wherein the slits are formed along trajectories which have opposite ends that are inclined in opposite directions in respect of a longitudinal generatrix of the surface of the cover.
  • said trajectories may correspond to continuous curved lines, tangent to said generating lines in correspondence of the central directrix of the roller surface, or else they may correspond to straight lines, extending from the central directrix of the roller surface with an opposite inclination in respect of said generating lines.
  • rollers thus conceived, the axial component produced on one half of the roller is neutralized by that produced on the other half thereof, whereby the sand belt always remains axially balanced. Moreover, since each one of the inclined slits--such as formed onto the surface of the roller according to the invention--presses the abrasive onto the floor in a gradual way, the quality of the floor surface always turns out to be excellent and the noise is suitably repressed.
  • FIG. 1 is a diagrammatic view of a first embodiment of the centrifugal expansion roller according to the invention
  • FIG. 2 illustrates the development of the surface of the roller shown in FIG. 1;
  • FIG. 3 illustrates the development of the surface of a second embodiment of the roller according to the invention.
  • a centrifugal expansion roller 1--on which is meant to be mounted an endless sand belt 2 for the sanding, for example, of floors by means of sanding machines--comprises a stiff metal core 3, with an outer resilient elastomeric cover 4 having an annular section.
  • a plurality of longitudinal slits 5 is formed onto the surface of the outer elastomeric annular cover 4, said slits 5 extending along non-radial planes according to trajectories corresponding to curved lines, tangent to the generating lines in correspondence of the central directrix of said surface and inclined in opposite directions in respect of said generating lines.
  • FIG. 2 shows the central directrix 6 and some generating lines 7 of the cylindrical surface of said cover onto which are formed the slits 5.
  • FIG. 3 illustrates the surface development of the outer elastomeric annular cover 4 in a second embodiment of the roller 1 according to the invention, wherein a plurality of longitudinal slits 8 is formed along non-radial planes of the cylindrical surface of said cover 4, according to trajectories corresponding to straight lines extending, with an opposite inclination in respect of the generating lines 7, from the central directrix 6 of said surface where they are mutually radiused.
  • the inclination in respect of the generating lines 7 is suitably of 30°.
  • centrifugal expansion roller there can be other embodiments of the centrifugal expansion roller according to the invention, differing from those described and illustrated.
  • the outer elastomeric annular cover of said roller can be provided with slits formed along trajectories differing from those described heretofore, without thereby departing from the scope of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Crushing And Grinding (AREA)
  • Cleaning In General (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US09/165,377 1997-10-02 1998-10-02 Centrifugal expansion roller for sanding machines Expired - Fee Related US6086466A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
IT97MI002239A IT1298703B1 (it) 1997-10-02 1997-10-02 Rullo ad espansione centrifuga perfezionato per macchine smerigliatrici
AT98117841T ATE213684T1 (de) 1997-10-02 1998-09-21 Fliehkraftaufweitbare rolle für schmirgelmaschinen
EP98117841A EP0906809B1 (de) 1997-10-02 1998-09-21 Fliehkraftaufweitbare Rolle für Schmirgelmaschinen
ES98117841T ES2172847T3 (es) 1997-10-02 1998-09-21 Rodillo de expansion centrifuga para maquinas de lijar.
DE69803964T DE69803964T2 (de) 1997-10-02 1998-09-21 Fliehkraftaufweitbare Rolle für Schmirgelmaschinen
PT98117841T PT906809E (pt) 1997-10-02 1998-09-21 Rolo centrifugo de expansao melhorado para lixadeiras
CA002246122A CA2246122C (en) 1997-10-02 1998-10-01 Improved centrifugal expansion roller for sanding machines
US09/165,377 US6086466A (en) 1997-10-02 1998-10-02 Centrifugal expansion roller for sanding machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI002239A IT1298703B1 (it) 1997-10-02 1997-10-02 Rullo ad espansione centrifuga perfezionato per macchine smerigliatrici
US09/165,377 US6086466A (en) 1997-10-02 1998-10-02 Centrifugal expansion roller for sanding machines

Publications (1)

Publication Number Publication Date
US6086466A true US6086466A (en) 2000-07-11

Family

ID=26331543

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/165,377 Expired - Fee Related US6086466A (en) 1997-10-02 1998-10-02 Centrifugal expansion roller for sanding machines

Country Status (8)

Country Link
US (1) US6086466A (de)
EP (1) EP0906809B1 (de)
AT (1) ATE213684T1 (de)
CA (1) CA2246122C (de)
DE (1) DE69803964T2 (de)
ES (1) ES2172847T3 (de)
IT (1) IT1298703B1 (de)
PT (1) PT906809E (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6908267B1 (en) * 2003-04-04 2005-06-21 Hiep N. Tran Variable radii cutter
US20070259611A1 (en) * 2006-04-12 2007-11-08 Gerd Eisenblatter Gmbh Fastening system, fastening adapter and fastening method
US20110207387A1 (en) * 2008-09-01 2011-08-25 Hire Technicians Group Ltd Sanding apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191108797A (en) * 1911-04-08 1912-04-04 British United Shoe Machinery Improvements in or relating to Scouring or Buffing Rolls and the like.
US1917303A (en) * 1928-05-24 1933-07-11 United Shoe Machinery Corp Abrading and scouring roll
US3166876A (en) * 1963-03-29 1965-01-26 Norton Co Coated abrasive implement
US3339319A (en) * 1964-10-29 1967-09-05 Timesavers Sanders Abrasive sleeve for rotary abrading machines
US4291507A (en) * 1979-11-28 1981-09-29 Littlehorn Jr John J High speed grinding wheel for glass
DE3243598A1 (de) * 1982-11-25 1984-05-30 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Traeger fuer endlos-schleifhuelse
US5567197A (en) * 1993-12-15 1996-10-22 Evensen; Kenneth Apparatus for sanding and buffing with a rotating roller
US5672096A (en) * 1996-05-22 1997-09-30 R. P. Abrasives & Machine, Inc. Inflatable tool
US5890953A (en) * 1994-10-18 1999-04-06 Evensen; Kenneth Method for apparatus for abrading and a rotating roller therefor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191108797A (en) * 1911-04-08 1912-04-04 British United Shoe Machinery Improvements in or relating to Scouring or Buffing Rolls and the like.
US1917303A (en) * 1928-05-24 1933-07-11 United Shoe Machinery Corp Abrading and scouring roll
US3166876A (en) * 1963-03-29 1965-01-26 Norton Co Coated abrasive implement
US3339319A (en) * 1964-10-29 1967-09-05 Timesavers Sanders Abrasive sleeve for rotary abrading machines
US4291507A (en) * 1979-11-28 1981-09-29 Littlehorn Jr John J High speed grinding wheel for glass
DE3243598A1 (de) * 1982-11-25 1984-05-30 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Traeger fuer endlos-schleifhuelse
US5567197A (en) * 1993-12-15 1996-10-22 Evensen; Kenneth Apparatus for sanding and buffing with a rotating roller
US5890953A (en) * 1994-10-18 1999-04-06 Evensen; Kenneth Method for apparatus for abrading and a rotating roller therefor
US5672096A (en) * 1996-05-22 1997-09-30 R. P. Abrasives & Machine, Inc. Inflatable tool

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Expandable Contact Wheel", p. 62, Mechanical Engineering, vol. 99, No. 4, Apr. 1977.
Expandable Contact Wheel , p. 62, Mechanical Engineering, vol. 99, No. 4, Apr. 1977. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6908267B1 (en) * 2003-04-04 2005-06-21 Hiep N. Tran Variable radii cutter
US20070259611A1 (en) * 2006-04-12 2007-11-08 Gerd Eisenblatter Gmbh Fastening system, fastening adapter and fastening method
US20110207387A1 (en) * 2008-09-01 2011-08-25 Hire Technicians Group Ltd Sanding apparatus
US8784163B2 (en) * 2008-09-01 2014-07-22 Hire Technicians Group Ltd. Sanding apparatus

Also Published As

Publication number Publication date
DE69803964D1 (de) 2002-04-04
CA2246122A1 (en) 1999-04-02
ITMI972239A1 (it) 1999-04-02
EP0906809B1 (de) 2002-02-27
PT906809E (pt) 2002-07-31
IT1298703B1 (it) 2000-01-12
DE69803964T2 (de) 2002-09-26
ES2172847T3 (es) 2002-10-01
EP0906809A1 (de) 1999-04-07
ATE213684T1 (de) 2002-03-15
CA2246122C (en) 2007-12-04

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TASIN, CLAUDIO;FELICI, ALBERTO;REEL/FRAME:009510/0205

Effective date: 19980917

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Effective date: 20120711